# USI\_I-NUCLEO-LRWAN1 Does not answer to join accept twice

**URL:** <https://www.thethingsnetwork.org/forum/t/usi-i-nucleo-lrwan1-does-not-answer-to-join-accept-twice/34353>\
**Category:** TTKG - The Things Kickstarter Gateway\
**Created:** [February 13, 2020, 9:31am UTC](https://www.thethingsnetwork.org/forum/t/usi-i-nucleo-lrwan1-does-not-answer-to-join-accept-twice/34353 "2020-02-13T09:31:36Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![julienD](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/juliend/32/25844_2.png) [@julienD](https://www.thethingsnetwork.org/forum/u/julienD)\
**Post date:** [February 13, 2020, 9:31am UTC](https://www.thethingsnetwork.org/forum/t/usi-i-nucleo-lrwan1-does-not-answer-to-join-accept-twice/34353/1 "2020-02-13T09:31:36Z")

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Hello,  
I run the at\_master example from I-NUCLEO-LRWAN2 eval pack.

I did update the firmaware to set my app id and app key using LoRa\_SetAppID() and LoRa\_SetKey().  
It worked correctly. I’m collecting data through TTN.

Then I did reboot the device and from that point, the app is no more functionnal.  
Using gateway logs from TTN. I can see that after a join request, the gateway sent a “Join Accept” frame. (see screenshot)

![image](https://www.thethingsnetwork.org/forum/uploads/default/original/3X/d/b/db99fa73a90d30cc90d83923a7172eabca884059.png)

If I sniff the serial port for AT commands, I can see that the modem answers “OK” to the “at+join=1” but does not send the “+JoinAccepted” as I think it should. See logs below:

Time [s] Direction   
4.219882000000000 \<— ‘0’   
4.676934000000000 \<— \r   
4.677020500000000 \<— #   
4.677108000000000 \<— ’ ’   
5.377679000000000 —\> A   
5.377766000000000 —\> T   
5.377853000000000 —\> E   
5.377940000000000 —\> =   
5.378027000000000 —\> 0   
5.378114000000000 —\> \r   
5.378921500000000 \<— O   
5.379008500000000 \<— K   
5.379095500000000 \<— \r   
5.379183000000000 \<— \n   
5.379343000000000 \<— \r   
5.379430000000000 \<— #   
5.379517000000000 \<— ’ ’   
7.383442500000000 —\> A   
7.383529500000000 —\> T   
7.383616500000000 —\> +   
7.383703500000000 —\> A   
7.383790500000000 —\> P   
7.383877500000000 —\> P   
7.383964500000000 —\> E   
7.384052000000000 —\> U   
7.384139000000000 —\> I   
7.384226000000000 —\> =   
7.384313000000000 —\> 7   
7.384400000000000 —\> 0   
7.384487000000000 —\> b   
7.384574000000000 —\> 3   
7.384661000000000 —\> d   
7.384748000000000 —\> 5   
7.384835000000000 —\> 7   
7.384922000000000 —\> e   
7.385009000000000 —\> d   
7.385096000000000 —\> 0   
7.385183000000000 —\> 0   
7.385270000000000 —\> 2   
7.385357000000000 —\> a   
7.385444000000000 —\> 5   
7.385531000000000 —\> 2   
7.385618000000000 —\> f   
7.385705000000000 —\> \r   
7.387433500000000 \<— O   
7.387520500000000 \<— K   
7.387607500000000 \<— \r   
7.387695000000000 \<— \n   
7.387855000000000 \<— \r   
7.387942000000000 \<— #   
7.388029000000000 \<— ’ ’   
8.389777000000000 —\> A   
8.389863500000001 —\> T   
8.389950499999999 —\> +   
8.390037500000000 —\> A   
8.390124500000001 —\> K   
8.390211499999999 —\> =   
8.390298500000000 —\> 0   
8.390385500000001 —\> a   
8.390472500000000 —\> 2   
8.390559500000000 —\> 8   
8.390646500000001 —\> c   
8.390733500000000 —\> a   
8.390820500000000 —\> d   
8.390907500000001 —\> 3   
8.390994500000000 —\> 9   
8.391081500000000 —\> d   
8.391168499999999 —\> 7   
8.391255500000000 —\> d   
8.391342500000000 —\> 6   
8.391429499999999 —\> 3   
8.391516500000000 —\> 9   
8.391603500000000 —\> 0   
8.391690499999999 —\> 5   
8.391777500000000 —\> 0   
8.391864500000001 —\> e   
8.391951499999999 —\> 6   
8.392038500000000 —\> 0   
8.392125500000001 —\> 8   
8.392212499999999 —\> b   
8.392299500000000 —\> 3   
8.392386500000001 —\> 1   
8.392473499999999 —\> b   
8.392560500000000 —\> f   
8.392647500000001 —\> 1   
8.392734500000000 —\> d   
8.392821500000000 —\> 0   
8.392908500000001 —\> 2   
8.392995500000000 —\> 7   
8.393082500000000 —\> \r   
8.395291500000001 \<— O   
8.395378500000000 \<— K   
8.395465500000000 \<— \r   
8.395552500000001 \<— \n   
8.395713000000001 \<— \r   
8.395799999999999 \<— #   
8.395887000000000 \<— ’ ’   
9.398038500000000 —\> A   
9.398125500000001 —\> T   
9.398212500000000 —\> \r   
9.398878500000000 \<— O   
9.398965499999999 \<— K   
9.399052500000000 \<— \r   
9.399139999999999 \<— \n   
9.399296500000000 —\> A   
9.399300000000000 \<— \r   
9.399383500000001 —\> T   
9.399387000000001 \<— #   
9.399470500000000 —\> +   
9.399474000000000 \<— ’ ’   
9.399557500000000 —\> E   
9.399644500000001 —\> U   
9.399731500000000 —\> I   
9.399819000000001 —\> \r   
9.412978000000001 \<— e   
9.413065000000000 \<— 2   
9.413152000000000 \<— COMMA   
9.413239500000000 \<— 4   
9.413326500000000 \<— f   
9.413413500000001 \<— COMMA   
9.413500500000000 \<— 4   
9.413587500000000 \<— 3   
9.413675000000000 \<— COMMA   
9.413762000000000 \<— f   
9.413849000000001 \<— f   
9.413936000000000 \<— COMMA   
9.414023500000001 \<— f   
9.414110500000000 \<— e   
9.414197500000000 \<— COMMA   
9.414284500000001 \<— 4   
9.414372000000000 \<— 4   
9.414459000000001 \<— COMMA   
9.414546000000000 \<— c   
9.414633000000000 \<— e   
9.414720000000001 \<— COMMA   
9.414807000000000 \<— f   
9.414894500000001 \<— f   
9.414981500000000 \<— \r   
9.415068500000000 \<— \n   
9.415253500000000 \<— O   
9.415340000000000 \<— K   
9.415427500000000 \<— \r   
9.415514500000000 \<— \n   
9.415675000000000 \<— \r   
9.415762000000001 \<— #   
9.415804500000000 —\> A   
9.415849000000000 \<— ’ ’   
9.415891500000001 —\> T   
9.415978500000000 —\> +   
9.416065500000000 —\> A   
9.416152500000001 —\> P   
9.416239500000000 —\> P   
9.416326500000000 —\> E   
9.416413500000001 —\> U   
9.416501000000000 —\> I   
9.416588000000001 —\> \r   
9.429144500000000 \<— 7   
9.429231500000000 \<— 0   
9.429318500000001 \<— COMMA   
9.429406000000000 \<— b   
9.429493000000001 \<— 3   
9.429580000000000 \<— COMMA   
9.429667000000000 \<— d   
9.429754000000001 \<— 5   
9.429841500000000 \<— COMMA   
9.429928500000001 \<— 7   
9.430015500000000 \<— e   
9.430102500000000 \<— COMMA   
9.430190000000000 \<— d   
9.430277000000000 \<— 0   
9.430364000000001 \<— COMMA   
9.430451000000000 \<— 0   
9.430538000000000 \<— 2   
9.430625500000000 \<— COMMA   
9.430712500000000 \<— a   
9.430799499999999 \<— 5   
9.430886500000000 \<— COMMA   
9.430973500000000 \<— 2   
9.431061000000000 \<— f   
9.431148000000000 \<— \r   
9.431235500000000 \<— \n   
9.431422500000000 \<— O   
9.431509000000000 \<— K   
9.431596499999999 \<— \r   
9.431683500000000 \<— \n   
9.431844000000000 \<— \r   
9.431931000000001 \<— #   
9.431998000000000 —\> A   
9.432017999999999 \<— ’ ’   
9.432085000000001 —\> T   
9.432172000000000 —\> +   
9.432259000000000 —\> A   
9.432346000000001 —\> D   
9.432433000000000 —\> R   
9.432520000000000 —\> =   
9.432607000000001 —\> 0   
9.432694000000000 —\> \r   
9.433870000000001 \<— O   
9.433956999999999 \<— K   
9.434044000000000 \<— \r   
9.434131499999999 \<— \n   
9.434291999999999 \<— \r   
9.434296000000000 —\> A   
9.434378499999999 \<— #   
9.434383000000000 —\> T   
9.434465500000000 \<— ’ ’   
9.434469999999999 —\> +   
9.434557000000000 —\> D   
9.434644000000000 —\> R   
9.434730999999999 —\> =   
9.434818000000000 —\> 3   
9.434905000000001 —\> \r   
9.436068499999999 \<— O   
9.436155500000000 \<— K   
9.436242500000001 \<— \r   
9.436330000000000 \<— \n   
9.436489999999999 \<— \r   
9.436577000000000 \<— #   
9.436589000000000 —\> A   
9.436664000000000 \<— ’ ’   
9.436676000000000 —\> T   
9.436762999999999 —\> +   
9.436850000000000 —\> J   
9.436937000000000 —\> O   
9.437023999999999 —\> I   
9.437111000000000 —\> N   
9.437198000000000 —\> =   
9.437284999999999 —\> 1   
9.437372000000000 —\> \r   
9.495920000000000 \<— O   
9.496007000000001 \<— K   
9.496093999999999 \<— \r   
9.496181000000000 \<— \n   
9.496341500000000 \<— \r   
9.496428500000000 \<— # \<\<-------- No answer to join.  
9.496515499999999 \<— ’ ’   
29.503772000000001 \<— ‘0’ \<\<-------- Start New attempt  
29.640532499999999 \<— \r   
29.640619000000001 \<— #   
29.640706500000000 \<— ’ ’   
30.509341500000001 —\> A   
30.509428499999999 —\> T   
30.509515499999999 —\> E   
30.509602999999998 —\> =   
30.509689999999999 —\> 0   
30.509777000000000 —\> \r   
30.510584000000001 \<— O   
30.510670999999999 \<— K   
30.510757999999999 \<— \r   
30.510845499999999 \<— \n   
30.511005999999998 \<— \r   
30.511092500000000 \<— #   
30.511180000000000 \<— ’ ’   
32.515253999999999 —\> A   
32.515340999999999 —\> T   
32.515428000000000 —\> +   
32.515515000000001 —\> A   
32.515602000000001 —\> P   
32.515689000000002 —\> P   
32.515776000000002 —\> E   
32.515863000000003 —\> U   
32.515949999999997 —\> I   
32.516036999999997 —\> =   
32.516123999999998 —\> 7   
32.516210999999998 —\> 0

That was yesterday. This morning, I reflashed the gateway firmware, plugged the node and… it works. I reboot the node et have the same issue than yesterday. I re-reflashed the gateway without anymore success.

Do you have any idea of what may happen?

Thanks  
Julien  
(And yes, I let everything in clear, in the above data in order that you can check everything if you need. This is a test app that will be destroyed in the future) .

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**Author:** ![milor](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/milor/32/32533_2.png) [@milor](https://www.thethingsnetwork.org/forum/u/milor)\
**Post date:** [April 26, 2020, 7:40pm UTC](https://www.thethingsnetwork.org/forum/t/usi-i-nucleo-lrwan1-does-not-answer-to-join-accept-twice/34353/2 "2020-04-26T19:40:40Z")

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Have you found a solution? (I thought it would be plug and play). I buy P-NUCLEO-LRWAN2.

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**Author:** ![julienD](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/juliend/32/25844_2.png) [@julienD](https://www.thethingsnetwork.org/forum/u/julienD)\
**Post date:** [April 27, 2020, 2:35pm UTC](https://www.thethingsnetwork.org/forum/t/usi-i-nucleo-lrwan1-does-not-answer-to-join-accept-twice/34353/3 "2020-04-27T14:35:26Z")

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Sorry, but no.  
See hee:

> <https://github.com/USIWP1Module/USI_I-NUCLEO-LRWAN1/issues/29>
>
> Hello,
> I run the at\_master example from I-NUCLEO-LRWAN2 eval pack.
> I did update the firmaware to set my app id and app key...

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<div class="post-metadata">

**Author:** ![milor](https://www.thethingsnetwork.org/forum/user_avatar/www.thethingsnetwork.org/milor/32/32533_2.png) [@milor](https://www.thethingsnetwork.org/forum/u/milor)\
**Post date:** [April 27, 2020, 4:22pm UTC](https://www.thethingsnetwork.org/forum/t/usi-i-nucleo-lrwan1-does-not-answer-to-join-accept-twice/34353/4 "2020-04-27T16:22:51Z")

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> [@julienD](#):
>
> Sorry, but no.  
> See hee:

Couldn’t we use a version that didn’t have the problem? (looks like it’s from 4.0.x